op san francisco



De 17, 1 w. R. SCHLAGE 1,739,654

DOOR LATCH Filed June 18, 1928 2 Sheets-Shee 1 IN V EN TOR.

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Dec. 17, }929. w. R. SCHLAGE DOOR LATCH Filed June 18, 1928 2Sheets-Sheet 2 INVENTOR. 1mm 7fl JW BY "WW4 M44412 6? ATTORNEYS.

Patented Dec. 17, 192% UNETED STATES PATENT OFFEE WALTER R. SCHLAGE, OFSAN FRANCISCO, CALIFORNIA, ASSIGNOR TO SCHLAGE LOCK 00., OF SANFRANCISCO, CALIFORNIA, A CORPORATION OF CALIFORNIA DOOR LATCHApplication filed June 18,

This invention relate to door latches of the type illustrated in my(to-pending appli- CHlloh Plllillfll Door latch filed April 18, 1928,Serial Number 270,815, and especially to a reversible latch bolt, whichpermits installation of a door latch in right or left hand doors, as thecase may be.

The object of the present invention is to generally improve and simplifythe construction and operation of door latches, to provide arerersil'ile latch bolt and guide plate and further to provide aconnection between the latch bolt and a retractor mechanism, where by rversal of the latch bolt may be effected without opening the lock, or inany way disturhing or re-arranging the mechanism.

The invention is shown by Way of illustration in the accompanyingdrawings, in which:

Fig. 1 is a perspective View of the latch bolt unit,

Fig. 2 is a perspective view of the latch bolt actuating unit, i

Fig. 3 is a perspective view of the retractor crank arm,

Fig. 4 is a perspective view of the anchor plate,

Fig. 5 is a perspective view-of the latch bolt and the outer end of theretractor link,

Fig. 6 is a central vertical longitudinal section of the door lock,showing the installation in a door, said section also showing a portionof the door in section,

Fig. 7 is a horizontal section of a door and the door-latch, showing itinstalled.

Referring to the drawings in detail, particularly to Figs. 1. 2, 6, 7, Aindicates a door latch actuating unit, and B. a bolt latch unit. Thebolt latch actuating unit is identical tothe bolt latch actuating unitshown inmyco-pending application already referred to. Briefly, itconsists of a cylinder, 2, in which is mounted a cylinder plug 3,provided with the usual tumblers. The cylinder 2 carries an escutch conplate 4,.and it is also provided with a 1928. Serial No. 286,078.

pair of lugs 5, 5 which supports a pair of post members 6 and 7, theouter ends of which are drilled and tapped to receive securing screws 6and 7, hereinafter to be described.

The latch bolt actuating unit otherwise includes a spindle bar 8, whichis secured to the cam 9 of the cylinder plug in any suitable manner. Thespindle 8 is rotated when a key is inserted in the cylinder, asindicated at 10, see Fig. 7, or it may be rotated by means of an innerknob, as indicated at 11. This knob is journalled in an inner.escutcheon plate-12, which is secured to the inner face of the door bymeans of the securin screws 6' and 7. The shank of the inner ob 11 isrecessed to receive the inner end of the s indie bar 8, and the spindlebar may thus be rotated either by the key actuated mechanism, or bymeans of the inner knob.

In preparing a door for the reception of a door latch such as hereillustrated, it is only necessary to drill or bore one hole transverselythrough the door, as indicated at C, and asecond hole through the edgeof the door, as indicated at D. The hole C is covered b the escutcheonplates 4 and 12 when the door atch is installed, while the hole D isclosed by a guide plate 14 hereinafter to be described. The escutcheonplates 4 and 12, together with the latch bolt actuating mechanismcarried thereby are secured by means .of the posts 6 and 7, and thesecurin screws 6 and 7' while the guide plate 14 is secured by means ofscrews 15 in the usual manner.

The feature forming the subject matter of the present application ismore particularly related to the latch bolt unit shown in Figs. 1, 6 and7. This unit consistsof an elongated cylindrical housing B, to the outerend of which is attached a guide plate 14. The inner end is closed by anend plate 16, and this is reinforced by means of a pair of plates 17.Extending inwardly from the end lates 16 and 17 is an anchor plate 18,this anc or plate being riveted or otherwise secured thereto. 90

The plate is provided with a perforation 19, at its inner end and with anotch 20 at its outer end. The post 7 passes through the perforation 19and the post 6 passes through the notch 20 when the two units of thedoor latch are assembled in the door, as shown in Fig. 7. The anchorplate connects the two units, and furthermore maintains the connectedparts of the mechanism in proper working position.

The latch bolt actuating unit B is provided with a latch bolt 21, seeFigs. 5, 6 and 7. This is provided with a flat face 22 on one side, andan inclined face 23 on the opposite side. Secured to the inner end ofthe latch bolt, as by a threaded connection such as shown at 24, is acylindrical extension 25, on which is formed a pair of interspacedcollars 26 and 27. A collar or washer 28 is interposed between the innerend of the latch bolt and the cylindrical extension 25, and this collar,together with the collar 26, is snugly fitted to the interior surface ofthe cylindrical housing B, and as such form guides for the latch boltwhen it is retracted and extended. The cylindrical extension 25 is coredout to receive helically compressed spring 30, this spring beingpositioned as shown in Fig. 6, normally exerting outward pressure, andas such maintains the latch bolt in an extended position.

The end plates 16 and 17 are slotted as indicated at 32, see Figs. 1 and6, and as such form a guide opening for a, retractor link, generallyindicated at 33, see Figs. 5 and 6. The inner end of this link isconnected with a pin 34, carried by a roll back crank 35, this roll backcrank being best illustrated in Figs. 1 and 3. The roll back crank isthus su ported by the spindle bar and it is rotated in unison with thesame when knob or key actuated.

The forward end of the retractor link 33 is hook shaped, as indicated at36. It straddles the inner collar 27, and as such forms a universalconnection which permits reversal of the latch bolt, which willhereinafter be described.

By referring to Figs. 1 and-6, it will be noted that an auxiliary guideplate 14 is secured to the rear side of the guide plate 14 and that anannular flange is formed between the auxiliary plate 14 and the outerend of the housing B. A swivel connection is thus formed which permitsthe guide plates 14 and 14 to be rotated with relation to the housing B.The latch bolt which projects to the guide plates may also be rotatedwithin the cylinder B, in unison therewith, as the guide flanges 26 and28 are circular, and so is the flange 27. The guide plate and the latchbolt may thus be reversed to fit right or left hand doors, and reversalmay be effected without opening or disconnecting the mechanism, as thehook 36 on the inner end of the retractor link cannot disengage theflange orcollar 27, no matter how much the latch bolt and guide plateare rotated.

\Vhile the reversible latch bolt and guide plate are here shown as beingconnected with a specificform of retractor and actuating mechanism, itis obvious that it may be applied to door latches of substantially anycharacter, as long as a universal connection is provided between theretractor and the inner end of the latch bolt.

While other features of the present invention have been more or lessspecifically illustrated, I wish it understood that various changes maybe resorted to within the scope of the appended claims, similarly thatthe materials and finishes of the several parts employed may be such asthe manufacturer may decide, or varying conditions or uses may demand.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. In a door latch, a latch bolt, a guide plate through which the latchbolt extends, a latch bolt housing, and a swivel joint formed betweenthe guide plate and the housing, said swivel joint permitting freerotation of the guide plate and the latch bolt with relation to thehousing.

2. In a door latch a latch bolt, a guide plate through which the latchbolt extends, a latch bolt housing, an extension on the inner end of thelatch bolt and within the housing, an annular collar on the inner end ofsaid extension, a retractor link, a hook shaped connection between thecollar and the retractor link, and a swivel joint formed between thehousing and the guide plate.

3. In a door latch, a guide plate, an auxiliary guide plate secured onthe rear side of the first named guide plate, an elongated cylindricalhousing, a swivel joint formed between the outer end of the housing andthe auxiliary guide plate, a latch bolt guided by the-housing and theguide plate, and extending through the guide plate, a retractor and aconnection between the retractor and the latch bolt permitting rotationof the latch bolt and the guide plates with relation to the housing.

4. In a door latch, a guide plate, an auxiliary guide plate secured onthe rear side of the first named guide plate, an elongated cylindricalhousing, a swivel joint formed -mitted without disconnecting theretractor linkand the latch bolt.

5. In a door latch, a latch bolt, a housing enclosing the latch bolt, aguide plate, an auxiliary guide plate, said auxiliary guide plate havingan opening formed therein to receive one end of the housing and a flangeon the end of the housing adapted to be interposed between the faceplate and the auxiliary face plate, said flange forming a swivelconnection between the housing and the plates.

WALTER R. SCHLAGE.

